8800GTX SLI Temps

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pc299

Supreme [H]ardness
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I just got my second 8800GTX in last night, and my temps went through the roof :(

With my 7950GT SLI, these were my temps: CPU 36C, NB 46C, System 36-40C, GFX ~55C under load.

With one GTX installed my temps were tolerable, CPU 36C, NB 50-55C, System 40C, GFX 70C max under load, 60-62C idle.

Now that I have 8800GTX SLI, my temps are horrible: CPU 36C, NB 69C, System 42C, GFX1 80C, GFX2 74C. Strangely enough the GTX's don't seem to cool off at all, they're steady at those temps, whether I'm gaming/benching, or just leave the pc idle (no change overnight) I turned my pc off for about 40 minutes this morning, and when I turned it back on the temps were tolerable... but they quickly climbed back up to the levels they were previously. Complete specs of my box in my sig. I'm wondering if there's anything I can do to get the cards to run cooler.

I can take pics of the inside of my case tonight if anyone's interested. The only thing I can think of right now to possibly help the temps, is to replace the 5 120's in my stacker with 110cfm Silverstone fans. Other than that I'm at a loss as to how I can improve the situation.
 
Mod those puppies! Put 1 or 2 120mm fans on the side of the cards or something.
 
I'd rather not do anything to them unless I knew it would help the temps, not even AS5'ing them as I don't want to screw up the thermal pads for the ram.
 
I know what you mean about the 8800gtx idling at high temps. After I load up a game it never does go back down to a low temp.

There's a couple things I did to lower GTX temps in my setup:

1) I forced the fan to run at a set speed instead of being thermally controlled. Try forcing it to run @ 80-85%. It's not really very loud at that speed and it cools a LOT better.

2) I got a piece of cardboard and wrapped it in electrical tape and made a kind of angled deflector to force the hot air that comes out of the 5 openings in the top of the gtx's heatsink to exit out the back of the case. It's kind of ghetto but it actually lowered the max temps of my 8800gtx by about 5-6C. I think you could do the same thing with a blower or 2 to suck the hot air coming out of the gtx's heatsink vents out the back of the case instead of letting it recirculate. That will probably be my next step.

Damn GTXs are like ovens though, even under good circumstances, so I don't know that there's much else you could do to cool them down better except water cooling.
 
I fired up rivatuner 2.0 and it said my fans were set at 100%, but I'm not sure if they really are. They are definitely spinning faster than previously, but I'd think they could go higher... and it didn't make a difference with temperatures. I think I'll try your cardboard trick and see if it helps at all, plus replacing my fans with higher cfm ones. Thanks for the reply, I'll let you know how things go.
 
They run pretty hot. I have 2 8800 GTXs running on a 680i with an E6700.

At idle with the CPU fan around 2000rpm my CPU temp is about 40-42c. MB is about 37-40c. GPU1 is 65 and GPU2 is 68 (lol shitty coolers). The stock coolers they ship with are total crap. I don't want to go to water cooling so I'm waiting for Zalman or Thermalright to come out with the 8800 coolers and I'll rip these stock coolers off.

Under load I hit about 46-50c on the cpu, up to 45c on the MB, and anywhere between 75c and 89c on the GPUs. I'm also using a Stacker 830 case with 6 fans so I can't image these stuck in some enclosed case with poor airflow. I'm sure the GPUs would easily clear 90c in that case and the cpu/mb would likely be over 50c.

I also have a multi-fan speed Zalman controller which comes in handy when playing with temps. I have pretty well all of the case fans hooked up to it, but I find the case fans don't make too much of a difference overall, regardless if they are on minimum speed or maximum.

Hope this helps ya.

pc299 said:
I just got my second 8800GTX in last night, and my temps went through the roof :(

With my 7950GT SLI, these were my temps: CPU 36C, NB 46C, System 36-40C, GFX ~55C under load.

With one GTX installed my temps were tolerable, CPU 36C, NB 50-55C, System 40C, GFX 70C max under load, 60-62C idle.

Now that I have 8800GTX SLI, my temps are horrible: CPU 36C, NB 69C, System 42C, GFX1 80C, GFX2 74C. Strangely enough the GTX's don't seem to cool off at all, they're steady at those temps, whether I'm gaming/benching, or just leave the pc idle (no change overnight) I turned my pc off for about 40 minutes this morning, and when I turned it back on the temps were tolerable... but they quickly climbed back up to the levels they were previously. Complete specs of my box in my sig. I'm wondering if there's anything I can do to get the cards to run cooler.

I can take pics of the inside of my case tonight if anyone's interested. The only thing I can think of right now to possibly help the temps, is to replace the 5 120's in my stacker with 110cfm Silverstone fans. Other than that I'm at a loss as to how I can improve the situation.
Click to expand...
 
Thanks, good to know I'm not alone, and I'll be watching for better coolers as you are.
 
pc299 said:
Thanks, good to know I'm not alone, and I'll be watching for better coolers as you are.
Click to expand...

According to their website they're coming out with the HR-03 for the 8800s. It's a fantastic vga cooler and very silent. Check out the benchmarks around town. I think you'll be pleasantly surprised. I had Zalman vga coolers on my last set of 7900s, but I think I'll try these this time around because they are super cool and allow you to mount just about any fan you want on them.
 
Yeah, just read a few reviews on it... it looks promising... I just hope it isn't too much of a space hog because of everything else I have in my system.
 
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